13445109 has 20 divisors (see below), whose sum is σ = 20258304. Its totient is φ = 8886024.

The previous prime is 13445101. The next prime is 13445119. The reversal of 13445109 is 90154431.

13445109 is nontrivially palindromic in base 11.

It is not a de Polignac number, because 13445109 - 2³ = 13445101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13445101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9634 + ... + 10940.

Almost surely, 2^13445109 is an apocalyptic number.

It is an amenable number.

13445109 is a deficient number, since it is larger than the sum of its proper divisors (6813195).

13445109 is a wasteful number, since it uses less digits than its factorization.

13445109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 13445109 is about 3666.7572867590. The cubic root of 13445109 is about 237.7870007793.

The spelling of 13445109 in words is "thirteen million, four hundred forty-five thousand, one hundred nine".